| 杨英迪.京雄城际铁路上跨既有线路连续梁转动体不平衡称重试验分析[J].唐山学院学报,2023,36(3):21-26 |
| 京雄城际铁路上跨既有线路连续梁转动体不平衡称重试验分析 |
| Analysis of Unbalanced Weighing Test for the Continuous Beam Swivels Across the Present Lines on Beijing-Xiong’an Intercity Railway |
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| DOI：10.16160/j.cnki.tsxyxb.2023.03.004 |
| 中文关键词: 连续梁桥 转体施工 球铰 称重试验 |
| 英文关键词: continuous girder swivel construction ball hinge weighing test |
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| 中文摘要: |
| 京雄城际铁路上跨南水北调天津干渠连续梁桥的上部结构采用(72+128+72) m连续梁,此连续梁与南水北调天津干渠交叉角度为31°54'24″,梁体为单箱单室、变高度、变截面箱梁,152#墩和153#墩上部采用球铰法进行转体施工。为确保转体过程的安全和转体施工的顺利进行,需要在转体前对转动体进行不平衡称重试验,对转动体不平衡力矩、摩擦力矩、偏心距及转动球铰静摩擦系数进行测试和分析。试验结果表明,根据不平衡力矩对桥梁进行配重,将该桥152#墩和153#墩的竖向不平衡力矩分别设置为0和0.001 m,可以确保转体施工过程中主桥的安全。 |
| 英文摘要: |
| The superstructure of the continuous beam across the Tianjin trunk canal of the south-to-north water diversion project on Beijing-Xiong’an intercity railway adopts (72+128+72) m beam,with the intersection angle of the canal and the beam 31° 54'24″, where the beam uses a single box single chamber, variable height, variable section box girder, and the upper parts of the 152# and 153# piers are rotated by ball hinge method. In order to ensure the process safety and the smooth construction of the swivel, the unbalanced weighing test for the swivel is carried out before the turning, where the unbalanced torque, frictional torque, eccentric distance and static friction coefficient of the rotating ball hinge are tested and analyzed.The results show that, the bridge is counterweighted according to the unbalanced torque. When the vertical torques of the 152# and the 153# piers are set to 0 and 0.001 m respectively, the safety of the main bridge can be ensured during the swivel construction. |
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